Dive into the fiery depths of man-made opal--a kaleidoscope of opalescent color that dances in the light. All the splendor of natural opal, manufactured into a harder composite (4-5 Moh's scale) that withstands heat and cold. Beautifully resembling natural opals, man-made opals are comprised of approximately 80% silica with 20% added epoxy for hardness and consistency. Well calibrated to fit standard cabochon settings.
Cabochons>Other Opal Varieties>BluesCabochonsOther Opal VarietiesBlues7x5mmOval5mmManmadehttp://www.firemountaingems.com/itemdetails/h203189cbH203189CBCabochon, "opal" (silica and epoxy) (man-made), light blue, 7x5mm calibrated oval. Sold per pkg of 2.//image1.fmgstatic.com/images/p3189cbb(3).jpg8.588.58As Low As $1.97 per cabochon